<template>
  <div class="cartcontrol">
    <transition name="move">
      <div class="cart-decrease" v-show="food.count>0" @click.stop.prevent="decreaseCart">
          <span class="inner icon-remove_circle_outline"></span>
      </div>
    </transition>
    <div class="cart-count" v-show="food.count>0">{{food.count}}</div>
    <div class="cart-add icon-add_circle" @click.stop.prevent="addCart($event)"></div>
  </div>
</template>

<script>
import Vue from 'vue'

export default {
  name: 'cartcontrol',
  props: {
    food: {
      type: Object
    }
  },
  methods: {
    // 添加到购物车
    addCart (e) {
      if (!this.food.count) {
        // 不存在count，给商品添加count，初始为1
        Vue.set(this.food, 'count', 1)
      } else {
        this.food.count++;
      }
      // 触发小球动画
      this.$root.$emit('cart-add', e.target);
    },
    // 移除购物车
    decreaseCart () {
      if (this.food.count) {
        this.food.count--;
      }
    }
  }
}
</script>

<style lang="stylus" rel="stylesheet/stylus" scoped>
  .cartcontrol
    font-size: 0
    .cart-decrease
      display: inline-block
      padding: 6px
      transition: all 0.4s linear
      .inner
          display: inline-block
          line-height: 24px
          font-size: 24px
          color: rgb(0, 160, 220)
          transition: all 0.4s linear
      &.move-enter-active, &.move-leave-active
        opacity: 1
        transform: translate3d(0, 0, 0)
        .inner
          transform: rotate(0)
      &.move-enter, &.move-leave-to
        opacity: 0
        transform: translate3d(24px, 0, 0)
        .inner
          transform: rotate(180deg)
    .cart-count
      display: inline-block
      vertical-align: top
      width: 12px
      padding-top: 6px
      line-height: 24px
      text-align: center
      font-size: 10px
      color: rgb(147, 153, 159)
    .cart-add
      display: inline-block
      padding: 6px
      line-height: 24px
      font-size: 24px
      color: rgb(0, 160, 220)
    
</style>
